Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe38989b6dd0f56…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 19:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4ba3f7ac85f83690d7ade2f6dac085f8 SHA-1: 547c8de065212c0b9bc0f88206eec286c4e72fb1 SHA-256: 7fe38989b6dd0f564549fc3fed9f1722823c10771acdf16b740d908214f2ad5a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-hacks-iphone-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-install-a-roblox-hacked-client-on-mac_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/boku-no-roblox-remastered-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/types-of-free-hair-on-roblox-not-model-for-girl_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-hack-generator-2021-that-i-can-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-le-bote-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-no-installing-apps_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pokemon-go-free-bag-upgrade_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/funny-hack-scripts-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/como-quitar-no-soy-un-robot-en-freer-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/comment-hacker-roblox-accesoir-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-robux-no-download-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E0 23268 bytes
SHA-256: 57bd4159d435df0f77562a1465fc7f27811a079c4b26b7b95ddb3f9bd34b4027
font_01_sfnt_off00006782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6782 18344 bytes
SHA-256: b25f1f54b32dc8a640253b18bc7ef351ac90ab75378d84f6bf8a3e5536491837

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